did a parallel install of 10.4 LTS today, used jaunty (9.04) until now. Had no problems with the system, just out of date.

The new installed system freezes every few minutes, even if I just start the system (auto log on). I use the INTEL GMA 950 onboard graphic. I heard of problems with some kernels with this chipsset, newer kernels should have this issue fixed - but I had a stable system using jaunty...

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There are several versions of Ubuntu you can try. 11.04, 11.10, and in 4 months, 12.04
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bodhi.zazenDec 28 '11 at 21:58

I upgraded the kernel to 2.6.32-37, did not change anything. Problem with updating to 11.04 or newer is, that there might be problems with parallel booting older systems due to changes in grub2. For now, I'll use 9.04 and test on a different hard drive - never touch a running...
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MarkusDec 28 '11 at 23:04

grub2, as far as I know, is fully backwards-compatible. The most recent kernel version is 3.0.0. mikewhatever made a helpful post - if you don't want to upgrade, try installing one of those kernels.
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RichardDec 31 '11 at 16:24